Spectral Feature Selection for Data Mining

148 Spectral Feature Selection for Data Mining

into more than one category. For instance, gene ontology annotation can be

used for obtaining the knowledge of both gene similarities and gene functions:

gene similarities can be obtained by comparing the annotation terms shared

among genes; and knowledge of gene function can be identified by checking

the annotation terms related to gene functions. Different types of knowledge

describe features or samples from different perspectives. The categorization

of different types of knowledge helps us identify their common characters and

allows us to develop common approaches to analyze the knowledge from the

same